package com.xxxx.seckill.controller;

import com.baomidou.mybatisplus.core.toolkit.CollectionUtils;
import com.wf.captcha.SpecCaptcha;
import com.xxxx.seckill.config.AccessLimit;
import com.xxxx.seckill.exception.GlobalException;
import com.xxxx.seckill.pojo.SeckillMessage;
import com.xxxx.seckill.pojo.SeckillOrder;
import com.xxxx.seckill.pojo.User;
import com.xxxx.seckill.rabbitmq.MQSender;
import com.xxxx.seckill.service.GoodsService;
import com.xxxx.seckill.service.OrderService;
import com.xxxx.seckill.service.SeckillOrderService;
import com.xxxx.seckill.utils.JsonUtil;
import com.xxxx.seckill.vo.GoodsVo;
import com.xxxx.seckill.vo.RespBean;
import com.xxxx.seckill.vo.RespBeanEnum;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.data.redis.core.script.RedisScript;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.TimeUnit;

@Slf4j
@Controller
@RequestMapping("/secKill")
public class SecKillController implements InitializingBean {
    @Autowired
    private GoodsService goodsService;

    @Autowired
    private SeckillOrderService seckillOrderService;

    @Autowired
    private OrderService orderService;

    @Autowired
    private RedisTemplate redisTemplate;

    @Autowired
    private MQSender mqSender;

    @Autowired
    private RedisScript<Long> script;

    private Map<Long,Boolean> EmptyStockMap = new HashMap<>();

//    @RequestMapping("/doSecKill")
//    public String deSecKill(Model model, User user, Long goodsId){
//        if(user == null){
//            return "login";
//        }
//        model.addAttribute("user",user);
//        GoodsVo goods = goodsService.findGoodsVoByGoodsId(goodsId);
//        if(goods.getStockCount()<1){
//            model.addAttribute("errmsg", RespBeanEnum.EMPTY_STOCK.getMessage());
//            return "secKillFail";
//        }
//        SeckillOrder one = seckillOrderService.getOne(new QueryWrapper<SeckillOrder>().eq("user_id", user.getId()).eq("goods_id", goodsId));
//        if(one!=null){
//            model.addAttribute("errmsg", RespBeanEnum.REPEATE_ERROR.getMessage());
//            return "secKillFail";
//        }
//        Order order = orderService.seckill(user,goods);
//        model.addAttribute("order",order);
//        model.addAttribute("goods",goods);
//        return "orderDetail";
//    }

    @RequestMapping(value = "/{path}/doSecKill",method = RequestMethod.POST)
    @ResponseBody
    public RespBean deSecKill(@PathVariable String path, User user, Long goodsId){
        if(user == null){
            return RespBean.error(RespBeanEnum.SESSION_ERROR);
        }
        ValueOperations valueOperations = redisTemplate.opsForValue();
        boolean check = orderService.checkPath(user,goodsId,path);
        if(!check){
            return RespBean.error(RespBeanEnum.REQUEST_ILLEGAL);
        }
        SeckillOrder seckillOrder = (SeckillOrder)redisTemplate.opsForValue().get("order:" + user.getId() + ":" + goodsId);
        if(seckillOrder!=null){
            return RespBean.error(RespBeanEnum.REPEATE_ERROR);
        }
        if(EmptyStockMap.get(goodsId)){
            return RespBean.error(RespBeanEnum.EMPTY_STOCK);
        }
        //Long stock = valueOperations.decrement("seckillGoods:" + goodsId);
        Long stock = (Long)redisTemplate.execute(script, Collections.singletonList("seckillGoods:" + goodsId), Collections.EMPTY_LIST);
        if(stock<0){
            EmptyStockMap.put(goodsId,true);
            valueOperations.increment("seckillGoods:" + goodsId);
            return RespBean.error(RespBeanEnum.EMPTY_STOCK);
        }
        SeckillMessage seckillMessage = new SeckillMessage(user,goodsId);
        mqSender.sendSeckillMessage(JsonUtil.object2JsonStr(seckillMessage));
        return RespBean.success(0);
//        GoodsVo goods = goodsService.findGoodsVoByGoodsId(goodsId);
//        if(goods.getStockCount()<1){
//            model.addAttribute("errmsg", RespBeanEnum.EMPTY_STOCK.getMessage());
//            return RespBean.error(RespBeanEnum.EMPTY_STOCK);
//        }
//        //SeckillOrder one = seckillOrderService.getOne(new QueryWrapper<SeckillOrder>().eq("user_id", user.getId()).eq("goods_id", goodsId));
//        SeckillOrder seckillOrder = (SeckillOrder)redisTemplate.opsForValue().get("order:" + user.getId() + ":" + goodsId);
//        if(seckillOrder!=null){
//            return RespBean.error(RespBeanEnum.REPEATE_ERROR);
//        }
//        Order order = orderService.seckill(user,goods);
//        return RespBean.success(order);
    }

    @RequestMapping(value = "/getResult",method = RequestMethod.GET)
    @ResponseBody
    public RespBean getResult(User user,Long goodsId){
        if(user==null){
            return RespBean.error(RespBeanEnum.SESSION_ERROR);
        }
        Long orderId = seckillOrderService.getResult(user,goodsId);
        return RespBean.success(orderId);
    }

    @AccessLimit(second=5,maxCount=5,needLogin=true)
    @RequestMapping(value = "/path",method = RequestMethod.GET)
    @ResponseBody
    public RespBean getPath(User user, Long goodsId, String captcha, HttpServletRequest request){
        if(user==null){
            return RespBean.error(RespBeanEnum.SESSION_ERROR);
        }
        boolean check = orderService.checkCaptcha(user,goodsId,captcha);
        if(!check){
            return RespBean.error(RespBeanEnum.ERROR_CAPTCHA);
        }
        String str = orderService.createPath(user,goodsId);
        return RespBean.success(str);
    }

    @RequestMapping(value = "/captcha",method = RequestMethod.GET)
    public void verifyCode(User user, Long goodsId, HttpServletResponse response){
        if(user==null||goodsId<0){
            throw new GlobalException(RespBeanEnum.REQUEST_ILLEGAL);
        }
        response.setContentType("image/jpg");
        response.setHeader("Pargam","No-cache");
        response.setHeader("Cache-Control","no-cache");
        response.setDateHeader("Expires",0);
        SpecCaptcha captcha = new SpecCaptcha(130,32,3);
        redisTemplate.opsForValue().set("captcha:"+user.getId()+":"+goodsId,captcha.text(),5, TimeUnit.MINUTES);
        try {
            captcha.out(response.getOutputStream());
        } catch (IOException e) {
            log.error("验证码生成失败",e.getMessage());
        }
    }

    @Override
    public void afterPropertiesSet() throws Exception {
        List<GoodsVo> list = goodsService.findGoodsVo();
        if(CollectionUtils.isEmpty(list)){
            return;
        }
        list.forEach(goodsVo ->{
            redisTemplate.opsForValue().set("seckillGoods:"+goodsVo.getId(),goodsVo.getStockCount());
            EmptyStockMap.put(goodsVo.getId(), false);
        });
    }
}
